EN IEC 60384-26:2018

SLOVENSKI STANDARD
01-oktober-2018
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SIST EN 60384-26:2010
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Fixed capacitors for use in electronic equipment - Part 26: Sectional specification - Fixed
aluminium electrolytic capacitors with conductive polymer solid electrolyte (IEC 60384-
26:2018)
Festkondensatoren zur Verwendung in Geräten der Elektronik - Teil 26:
Rahmenspezifikation - Aluminium-Elektrolyt-Kondensatoren mit leitfähigem
Polymerfestkörper-Elektrolyten (IEC 60384-26:2018)
Condensateurs fixes utilisés dans les équipements électroniques - Partie 26:
Spécification intermédiaire - Condensateurs fixes électrolytiques en aluminium à
electrolyte solide en polymère conducteur (IEC 60384-26:2018)
Ta slovenski standard je istoveten z: EN IEC 60384-26:2018
ICS:
31.060.50 Aluminijski elektrolitni Aluminium electrolytic
kondenzatorji capacitors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60384-26

NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2018
ICS 31.060.50 Supersedes EN 60384-26:2010
English Version
Fixed capacitors for use in electronic equipment -
Part 26: Sectional specification - Fixed aluminium electrolytic
capacitors with conductive polymer solid electrolyte
(IEC 60384-26:2018)
Condensateurs fixes utilisés dans les équipements Festkondensatoren zur Verwendung in Geräten der
électroniques - Partie 26: Spécification intermédiaire - Elektronik - Teil 26: Rahmenspezifikation - Aluminium-
Condensateurs fixes électrolytiques en aluminium à Elektrolyt-Kondensatoren mit leitfähigem
électrolyte solide en polymère conducteur Polymerfestkörper-Elektrolyten
(IEC 60384-26:2018) (IEC 60384-26:2018)
This European Standard was approved by CENELEC on 2018-06-21. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60384-26:2018 E

European foreword
The text of document 40/2599/FDIS, future edition 2 of IEC 60384-26, prepared by
IEC/TC 40 "Capacitors and resistors for electronic equipment" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN IEC 60384-26:2018.

The following dates are fixed:
(dop) 2019-03-21
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2021-06-21
standards conflicting with the
document have to be withdrawn
This document supersedes EN 60384-26:2010.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice
The text of the International Standard IEC 60384-26:2018 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60384-4:2016 NOTE Harmonized as EN 60384-4:2016 (not modified).
IEC 60384-25:2015 NOTE Harmonized as EN 60384-25:2015 (not modified).
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year

IEC 60063 -  Preferred number series for resistors and EN 60063 -
capacitors
IEC 60068-1 2013 Environmental testing - EN 60068-1 2014
Part 1: General and guidance
IEC 60068-2-20 2008 Environmental testing - EN 60068-2-20 2008
Part 2-20: Tests - Test T: Test methods for
solderability and resistance to soldering
heat of devices with leads
IEC 60384-1 2016 Fixed capacitors for use in electronic EN 60384-1 2016
equipment -
Part 1: Generic specification
IEC 60417-DB -  Graphical symbols for use on equipment - -
IEC 61193-2 2007 Quality assessment systems - EN 61193-2 2007
Part 2: Selection and use of sampling
plans for inspection of electronic
components and packages
ISO 3 - Preferred numbers - Series of preferred - -
numbers
IEC 60384-26 ®
Edition 2.0 2018-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fixed capacitors for use in electronic equipment –

Part 26: Sectional specification – Fixed aluminium electrolytic capacitors with

conductive polymer solid electrolyte

Condensateurs fixes utilisés dans les équipements électroniques –

Partie 26: Spécification intermédiaire – Condensateurs fixes électrolytiques en

aluminium à électrolyte solide en polymère conducteur

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.060.50 ISBN 978-2-8322-5696-1

– 2 – IEC 60384-26:2018 © IEC 2018
CONTENTS
FOREWORD . 5
1 General . 7
1.1 Scope . 7
1.2 Object . 7
1.3 Normative references . 7
1.4 Information to be given in a detail specification . 8
1.4.1 General . 8
1.4.2 Outline drawings and dimensions . 8
1.4.3 Mounting . 8
1.4.4 Rating and characteristics . 8
1.4.5 Marking . 9
1.5 Terms and definitions . 9
1.6 Marking . 9
1.6.1 General . 9
1.6.2 Information for marking . 9
1.6.3 Marking on capacitors . 10
1.6.4 Marking on packaging . 10
2 Preferred ratings and characteristics . 10
2.1 Preferred characteristics . 10
2.2 Preferred values of ratings . 10
2.2.1 Nominal capacitance (C ) . 10
N
2.2.2 Tolerance on nominal capacitance . 10
2.2.3 Rated voltage (U ) . 10
R
2.2.4 Category voltage (U ). 11
C
2.2.5 Surge voltage . 11
2.2.6 Rated temperature . 11
3 Quality assessment procedures . 11
3.1 Primary stage of manufacture . 11
3.2 Structurally similar components . 11
3.3 Certified test records of released lots . 11
3.4 Qualification approval (QA) procedures . 11
3.4.1 General . 11
3.4.2 Qualification approval on the basis of the fixed sample size procedure . 11
3.4.3 Tests . 12
3.5 Quality conformance inspection . 19
3.5.1 Formation of inspection lots . 19
3.5.2 The schedule . 20
3.5.3 Delayed delivery . 20
3.5.4 Assessment levels . 20
4 Test and measurement procedures . 21
4.1 Pre-conditioning (if required) . 21
4.2 Measuring conditions . 21
4.3 Visual examination and check of dimensions . 21
4.3.1 General . 21
4.3.2 Visual examination and check of dimensions . 21
4.3.3 Requirements . 22
4.4 Electrical tests . 22

IEC 60384-26:2018 © IEC 2018 – 3 –
4.4.1 Leakage current . 22
4.4.2 Capacitance . 22
4.4.3 Tangent of loss angle (tan δ) . 23
4.4.4 Equivalent series resistance (ESR) . 23
4.5 Robustness of terminations . 23
4.5.1 General . 23
4.5.2 Initial inspection. 23
4.5.3 Final inspections and requirements . 23
4.6 Resistance to soldering heat . 23
4.6.1 General . 23
4.6.2 Initial inspection. 24
4.6.3 Test conditions . 24
4.6.4 Final inspections and requirements . 24
4.7 Solderability . 24
4.7.1 General . 24
4.7.2 Test conditions . 24
4.7.3 Final inspections and requirements . 24
4.8 Rapid change of temperature . 24
4.8.1 General . 24
4.8.2 Initial inspection. 24
4.8.3 Test conditions . 24
4.8.4 Recovery . 25
4.8.5 Final inspections and requirements . 25
4.9 Vibration . 25
4.9.1 General . 25
4.9.2 Test conditions . 25
4.9.3 Final inspections and requirements . 25
4.10 Shock . 25
4.10.1 General . 25
4.10.2 Test conditions . 25
4.10.3 Final inspections and requirements . 25
4.11 Bump . 25
4.11.1 General . 25
4.11.2 Test conditions . 26
4.11.3 Final inspections and requirements . 26
4.12 Climatic sequence. 26
4.12.1 General . 26
4.12.2 Initial inspection. 26
4.12.3 Dry heat . 26
4.12.4 Damp heat, cyclic, Test Db, first cycle . 26
4.12.5 Cold. 26
4.12.6 Damp heat, cyclic, Test Db, remaining cycles . 26
4.12.7 Recovery . 26
4.12.8 Final inspections and requirements . 26
4.13 Damp heat, steady state . 27
4.13.1 General . 27
4.13.2 Initial inspection. 27
4.13.3 Test conditions . 27
4.13.4 Recovery . 27

– 4 – IEC 60384-26:2018 © IEC 2018
4.13.5 Final inspections and requirements . 27
4.14 Endurance . 27
4.14.1 General . 27
4.14.2 Initial inspection. 27
4.14.3 Test conditions . 27
4.14.4 Recovery . 27
4.14.5 Final inspections and requirements . 27
4.15 Surge . 27
4.15.1 General . 27
4.15.2 Initial inspection. 28
4.15.3 Test conditions . 28
4.15.4 Recovery . 28
4.15.5 Final inspections and requirements . 28
4.16 Reverse voltage (if required) . 28
4.16.1 Initial inspection. 28
4.16.2 Test conditions . 28
4.16.3 Recovery . 28
4.16.4 Final inspections and requirements . 28
4.17 Component solvent resistance (if required) . 29
4.18 Solvent resistance of the marking (if required) . 29
4.19 Storage at high temperature . 29
4.19.1 General . 29
4.19.2 Initial inspection. 29
4.19.3 Test conditions . 29
4.19.4 Recovery . 29
4.19.5 Final inspections and requirements . 29
4.20 Characteristics at high and low temperature . 29
4.20.1 General . 29
4.20.2 Inspections and requirements . 29
4.21 Charge and discharge (if required) . 29
4.21.1 General . 29
4.21.2 Initial inspection. 29
4.21.3 Test conditions . 30
4.21.4 Final inspections and requirements . 30
4.22 High surge current (if required) . 30
4.22.1 General . 30
4.22.2 Initial inspection. 30
4.22.3 Final inspections and requirements . 30
Bibliography . 31

Table 1 – Surge voltages . 11
Table 2 – Sampling plan for qualification approval, assessment level EZ . 13
Table 3 – Test schedule for qualification approval . 14
Table 4 – Lot-by-lot inspection . 20
Table 5 – Periodic inspection . 21

IEC 60384-26:2018 © IEC 2018 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIXED CAPACITORS FOR USE IN ELECTRONIC EQUIPMENT –

Part 26: Sectional specification – Fixed aluminium electrolytic
capacitors with conductive polymer solid electrolyte

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60384-26 has been prepared by IEC technical committee 40:
Capacitors and resistors for electronic equipment.
This second edition cancels and replaces the first edition published in 2010. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) revision of the structure in accordance with ISO/IEC Directives, Part 2:2016 to the extent
practicable, and harmonization between other similar kinds of documents;
b) in addition, Clause 4 and all the tables have been reviewed in order to prevent
duplications and contradictions.

– 6 – IEC 60384-26:2018 © IEC 2018
The text of this International Standard is based on the following documents:
FDIS Report on voting
40/2599/FDIS 40/2605/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 60384 series can be found, under the general title Fixed
capacitors for use in electronic equipment, on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IEC 60384-26:2018 © IEC 2018 – 7 –
FIXED CAPACITORS FOR USE IN ELECTRONIC EQUIPMENT –

Part 26: Sectional specification – Fixed aluminium electrolytic
capacitors with conductive polymer solid electrolyte

1 General
1.1 Scope
This part of IEC 60384 applies to fixed aluminium electrolytic capacitors with conductive
polymer solid electrolyte primarily intended for d.c. applications for use in electronic
equipment.
Fixed aluminium electrolytic capacitors with solid (MnO ) electrolyte are covered by
IEC 60384-4. Fixed aluminium electrolytic surface mount capacitors with conductive polymer
solid electrolyte are covered by IEC 60384-25.
1.2 Object
The object of this document is to prescribe preferred ratings and characteristics and to select
from IEC 60384-1, the appropriate quality assessment procedures, tests and measuring
methods and to give general performance requirements for this type of capacitor. Test
severities and requirements prescribed in detail specifications referring to this sectional
specification shall be of equal or higher performance level, because lower performance levels
are not permitted.
1.3 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
Preferred number series for resistors and capacitors
IEC 60063,
IEC 60068-1:2013, Environmental testing – Part 1: General and guidance
IEC 60068-2-20:2008, Environmental testing – Part 2-20: Tests – Test T – Test methods for
solderability and resistance to soldering heat of devices with leads
IEC 60384-1:2016, Fixed capacitors for use in electronic equipment – Part 1: Generic
specification
IEC 60417, Graphical symbols for use on equipment (available at http://www.graphical-
symbols.info/equipment)
IEC 61193-2:2007, Quality assessment systems – Part 2: Selection and use of sampling plans
for inspection of electronic components and packages
ISO 3, Preferred numbers – Series of preferred numbers

– 8 – IEC 60384-26:2018 © IEC 2018
1.4 Information to be given in a detail specification
1.4.1 General
Detail specifications shall be derived from the blank detail specification.
Detail specifications shall not specify requirements inferior to those of the generic, sectional
or blank detail specification. When more severe requirements are included, they shall be
listed in 1.9 of the detail specification and indicated in the test schedules, for example by an
asterisk.
The information given in 1.4.2 may, for convenience, be presented in tabular form.
The following information shall be given in each detail specification and the values quoted
shall preferably be selected from those given in the appropriate clause of this sectional
specification.
1.4.2 Outline drawings and dimensions
There shall be an illustration of the capacitors as an aid to easy recognition and for
comparison of the capacitors with others. Dimensions and their associated tolerances, which
affect interchangeability and mounting, shall be given in the detail specification. All
dimensions shall preferably be stated in millimetres; however, when the original dimensions
are given in inches, the converted metric dimensions in millimetres shall be added.
The numerical values of the body shall be given as follows:
– general case: width, length and height;
– for cylindrical body: diameter and length.
The numerical values of the terminals shall be given as follows:
– for leaded terminals: diameter, length and spacing.
When the configuration is other than described above, the detail specification shall state such

dimensional information as will adequately describe the capacitor.
1.4.3 Mounting
The detail specification shall specify the method of mounting to be applied for normal use and
for the application of the vibration and the bump or shock tests. The design of the capacitor
may be such that special mounting fixtures are required in its use. In this case, the detail
specification shall describe the mounting fixtures and they shall be used in the application of
the vibration and bump or shock tests.
1.4.4 Rating and characteristics
1.4.4.1 General
The ratings and characteristics shall be given in accordance with the relevant subclauses of
this sectional specification, including the items specified in 1.4.4.2 to 1.4.4.4.
1.4.4.2 Nominal capacitance range
See 2.2.1.
When products approved to the detail specification have different nominal capacitance ranges,
the following statement should be added:

IEC 60384-26:2018 © IEC 2018 – 9 –
"The nominal capacitance range available in each voltage range is given in the register of
approvals, available for example on the website www.iecq.org".
1.4.4.3 Particular characteristics
Additional characteristics may be listed when they are considered necessary to specify
adequately the component for design and application purposes.
1.4.4.4 Soldering
The detail specification shall specify the test methods, severities and requirements applicable
for the solderability and the resistance to soldering heat tests.
1.4.5 Marking
The detail specification shall specify the content of the marking on the capacitor and on the
packaging. Any deviations from 1.6 shall be stated in the detail specification.
1.5 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60384-1:2016 and
the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
1.5.1
capacitance
capacitance of an equivalent circuit having capacitance and
resistance in series measured with alternating current approximately sinusoidal waveform at a
specified frequency
1.6 Marking
1.6.1 General
See IEC 60384-1:2016, 2.4, with 1.6.2, 1.6.3 and 1.6.4 of this document.
1.6.2 Information for marking
Information given in the marking is normally selected from the following list; the relative
importance of each item is indicated by its position in the list:
a) polarity of the terminations;
b) nominal capacitance;
c) rated voltage (d.c. voltage may be indicated by the symbol:    (IEC 60417-5031-2002-10)
or     );
d) year and month (or, year and week) of manufacture;
e) manufacturer’s name and/or trade mark;
f) tolerance on nominal capacitance;
g) category temperature;
h) manufacturer’s type designation;
i) reference to the detail specification.

– 10 – IEC 60384-26:2018 © IEC 2018
1.6.3 Marking on capacitors
Polarity of the terminations shall be marked. The other information listed in 1.6.2 is marked as
necessary.
Any marking shall be legible and not easily smeared or removed by rubbing with a finger.
1.6.4 Marking on packaging
The packaging containing the capacitors should be clearly marked with the information listed
in 1.6.2 as necessary.
2 Preferred ratings and characteristics
2.1 Preferred characteristics
Preferred climatic categories only shall be given in the preferred characteristics.
The capacitors covered by this sectional specification are classified into climatic categories in
accordance with the general rules given in IEC 60068-1:2013, Annex A.
The lower and upper category temperatures shall be taken from the following:
– lower category temperature: −55 °C;
– upper category temperature: +105 °C and +125 °C.
The severities for the cold and dry heat tests are the lower and upper category temperatures
respectively.
2.2 Preferred values of ratings
2.2.1 Nominal capacitance (C )
N
Preferred values of nominal capacitance are indicated in microfarad (µF).
Preferred values of nominal capacitance shall be taken from the E12 series of IEC 60063 as
follows:
1,0 – 1,2 – 1,5 – 1,8 – 2,2 – 2,7 – 3,3 – 3,9 – 4,7 – 5,6 – 6,8 – 8,2;
n
and their decimal multiples (× 10 , n: integer).
2.2.2 Tolerance on nominal capacitance
Preferred values of tolerance on nominal capacitance are:
± 10 % and ± 20 %.
2.2.3 Rated voltage (U )
R
Preferred values of rated d.c. voltages taken from the R10 and R20 series of ISO 3 are:
– from R10: 1,0 – 1,25 – 1,6 – 2,0 – 2,5 – 3,15 – 4,0 – 5,0 – 6,3 – 8,0;
– from R20: 3,5 – 4,5;
_____________
ISO 3 indicates the value 3,55 for R20.

IEC 60384-26:2018 © IEC 2018 – 11 –
n
– and their decimal multiples (× 10 , n: integer).
2.2.4 Category voltage (U )
C
The category voltage is equal to the rated voltage.
2.2.5 Surge voltage
The surge voltage shall be 1,15 times the rated voltage rounded off (significant digit of 2) to
the nearest volt (see Table 1).
Table 1 – Surge voltages
Values in volts
Rated voltage 2,0 2,5 4,0 5,0 6,3 8,0 10 12,5 16 20 25 35 50
Surge voltage 2,3 2,9 4,6 5,8 7,2 9,2 12 14 18 23 29 40 58

2.2.6 Rated temperature
The value of the rated temperature shall be upper category temperature.
3 Quality assessment procedures
3.1 Primary stage of manufacture
The primary stage of manufacture is the capacitor manufacturer's evaluation of the formed
anode foil.
3.2 Structurally similar components
Capacitors, considered as being structurally similar, are capacitors produced with similar
processes and materials, though they may be of different case sizes and values.
3.3 Certified test records of released lots
The information required in IEC 60384-1:2016, Q.1.5, shall be made available when
prescribed in the detail specification and when requested by a purchaser. After the endurance
test, the required parameters are the capacitance change, tangent of loss angle or equivalent
series resistance, and leakage current.
3.4 Qualification approval (QA) procedures
3.4.1 General
The procedures for qualification approval testing are given in IEC 60384-1:2016, Clause Q.2.
The schedule to be used for qualification approval testing on the basis of lot-by-lot and
periodic tests is given in 3.5. The procedure using a fixed sample size schedule is given in
3.4.2 and 3.4.3.
3.4.2 Qualification approval on the basis of the fixed sample size procedure
The fixed sample size procedure is described in IEC 60384-1:2016, Q.2.4. The sample shall
be representative of the range of capacitors for which approval is sought. The sample may be
the whole or the part of the range given in the detail specification.

– 12 – IEC 60384-26:2018 © IEC 2018
The sample shall consist of four specimens having the maximum and minimum rated voltages
and, for these voltages, the maximum and minimum case size. When there are more than four
case sizes, an intermediate case size shall also be tested. In each of these case size/voltage
combinations (values), the maximum capacitance shall be chosen. Thus, for the approval of a
range, testing is required of either four or six values. Where the range consists of fewer than
four values, the number of specimens to be tested shall be that required for four values.
Two (for 6 values) or three (for 4 values) specimens per value may be used as replacements
for specimens that are non-conforming because of incidents not attributable to the
manufacturer.
The numbers given in Group 0 assume that all groups are applicable. If this is not so, the
numbers may be reduced accordingly.
When additional groups are introduced into the qualification approval test schedule, the
number of specimens required for Group 0 shall be increased by the same number as that
required for the additional groups.
Table 2 gives the number of samples to be tested in each group or subgroup together with the
number of permissible non-conformances for qualification approval test.
3.4.3 Tests
The complete series of tests specified in Table 2 and Table 3 are required for the approval of
capacitors covered by a detail specification. The tests of each group shall be carried out in
the order given.
The whole sample shall be subjected to the tests of Group 0 and then divided for the other
groups.
Specimens found to be non-conforming in the tests of Group 0 shall not be used for the other
groups.
Approval is granted when the number of non-conforming items is zero.
Table 2 and Table 3 together form the fixed sample size test schedule for the qualification
approval on the basis of the fixed sample size procedure. Table 2 gives the number of the
samples and permissible non-conforming items for each test or test group. Table 3 gives a
summary of the test conditions and performance requirements, and when a choice shall be
made in the detail specification.
The test conditions and performance requirements for the qualification approval on the basis
of the fixed sample size procedure should be identical to those for quality conformance
inspection given in the detail specification.

IEC 60384-26:2018 © IEC 2018 – 13 –
Table 2 – Sampling plan for qualification approval, assessment level EZ
Permissible
Group Number of
Test Subclause number of non-
no. specimens
conforming items
b c
n c
a
0 High surge current 4.22
Visual examination 4.3
Dimensions 4.3
d
Leakage current 4.4.1 120 + 12 0
Capacitance 4.4.2
4.4.3
Tangent of loss angle (tan δ)
4.4.4
Equivalent series resistance (ESR)

Spare specimens
1A Robustness of terminations 4.5
Resistance to soldering heat 4.6 12 0
a
Component solvent resistance 4.17
1B Solderability 4.7
a
Solvent resistance of the marking 4.18
Rapid change of temperature 4.8
24 0
Vibration 4.9
Shock or bump 4.10 or 4.11
(Specify in the detail specification)

1 Climatic sequence 4.12 36 0
Damp heat, steady state 4.13 24 0
3 Endurance 4.14 36 0
4 Storage at high temperature 4.19
Surge 4.15
12 0
a
Reverse voltage 4.16
5 Characteristics at high and low 4.20
temperature
12 0
4.21
a
Charge and discharge
a
If require
...